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Tarentola parvicarinata n. sp. appears to be closely related to T. annularis (GEOFFROY), but differs from the latter species in (1) a paler colour lacking the four white scapular spots typical for T. annularis (Figs. 1,2) ; (2) delicately keeled dorsal scales and tubercles (Figs. 3, 4); (3) in general only 12 rows of dorsal tubercles; (4) a lower count of lamellae and scales under the tows, especially the fifth tow (Fig. 6); (5) smaller size (snout-vent below 10 cm). T. parvicarinata is distributed in rocky areas of southern Mauritania, eastern Senegal, western Mali, northern Guinea, and on Mt. Loma in Sierra Leone. In the Mauritanian Adrar mountains, sympatry with T. annularis occurs (Fig. 7). In Senegal, there is evidence for an anthropogenic extension of range, presently taking place along the railway line Kayes-Dakar.